CN102199478A - Wet flattening solution and preparation method thereof - Google Patents

Abstract

The invention relates to a wet flattening solution and a preparation method thereof. The wet fattening solution comprises the following ingredients: 1-2 parts of EDTA (Ethylene Diamine Tetraacetic Acid) tetrasodium, 0.1-1 part of anti-foaming agent, 100-130 parts of organic amine, 0.01-1 part of emulsifying agent, 400-450 parts of antirust agent, 30-50 parts of inorganic acid and 600-800 parts of deionized water. The preparation method comprises the following steps of: gradually mixing the ingredients and then heating, stirring and finally detecting to obtain the finished wet flattening solution product. The wet flattening solution provided by the invention has favorable antirust property and anticorrosion property and can be used for effectively protecting favorable cleaning of a working roll, improving the cleanness level of steel strips, preventing scraps from forming on the roll, reducing the fouling of the working roll, effectively controlling the down rate and avoiding slippage and compatibility with coating oil of a steel plate so as to prevent grease/oil pollution.

Description

A kind of wet-leveling liquid and preparation method thereof

Technical field

The invention belongs to the lubricating oil field, especially a kind of wet-leveling liquid and preparation method thereof.

Background technology

The cold-rolled steel sheet production process is generally through overpickling, rolling, annealing, smooth and five operations of finishing.Wherein smooth is after the band steel recrystallization annealing under the pressure with 0.3%-3%, the cold finish rolling process of carrying out, and this process determines surface shape, template, mechanical property, the processing performance of finished strip to a great extent.

Smooth be divided into wet smooth with do smooth, wet smooth and dried smooth comparing, have following advantage: since wet smooth be that inlet side at working roll sprays de-salted water and cleans roll and belt steel surface, reducing roll roll marks and other surface imperfection after smooth, thereby can produce the steel plate of high degree of sorting.Can reduce the number of times of changing working roll, prolong the work-ing life of roll.Do when smooth and be in tangible dry condition in the contact arc, and wet be the semi-dry friction state when smooth, thereby all dried little when smooth of unit rolling load, roll deflection and wearing and tearing.Help the control of permanent unit elongation and surface quality.Wet when smooth the metal transverse flow be easy to do when smooth, the unit rolling load of band steel be subjected to plate wide influence less.Facts have proved that the wet smooth ratio of high regime is done the smooth permanent elongation control that more helps.Wet smoothly also come with some shortcomings, the roughness of roll can not directly be pressed onto on the belt steel surface, needs to improve the roughness of dull roll.Because the lubrication of smoothing agent, the smooth control ratio of little unit elongation be difficulty.

Wet-leveling liquid is mainly used in the temper rolling technology after iron and steel enterprise's cold-rolled steel sheet annealing, its objective is in order to remove the dirts such as carbon residue that steel plate forms to greatest extent after cover annealing, obtains best plate face smooth finish.Wet-leveling liquid mainly be with organic water-soluble rust-preventive agent, lubricant, clean-out system is composite forms, should notice that used lube product contains the potential noxious pollutant, must avoid prolonging or with the used product of any kind and form skin contact is arranged repeatedly.

In China, owing to the gap on the understanding and technology, reason such as backward in technique, the wet-leveling liquid produced of domestic manufacturer is still based on the inorganic wet-leveling liquid of nitrite at present, and this wet-leveling liquid ubiquity is shortcoming and defect once, and 1, antirust cleaning performance is relatively poor; 2, health and the environmental safety problem brought of nitrite.Can not satisfy required good, the high-quality organic wet-leveling liquids of safety and sanitation reliable quality of antirust cleaning performance of some steel-making enterprises such as Baosteel.

According to the retrieval, find following patent documentation, wherein CN101092693 discloses a kind of anti-macula lutea, environment friendly wet-leveling liquid, contains organic acid 5～35%, organic amine 5～35%, inhibiter 2～20%, membrane-forming agent 2～20%, film forming accelerating 1～10%, tensio-active agent 0.1～1%, water 10～35%.CN101812692A discloses a kind of environment friendly wet-leveling liquid composite, wherein composition: 5～30% organic acid; 5%～40% organic amine; 1～15% inhibiter; 1%～15% membrane-forming agent; 1%～15% film forming accelerating; 1%～10% lubricant; 0.1～1.5% tensio-active agent; 10%～40% water.

There are bigger difference in above-mentioned patent and this patent.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art part, provide to the invention discloses a kind of anti-macula lutea, environment friendly wet-leveling liquid and preparation method thereof.

The present invention is achieved through the following technical solutions purpose:

A kind of wet-leveling liquid, its moiety and parts by weight are as follows:

And described kilfoam is:

And described organic amine is a Monoethanolamine MEA BASF.

And described emulsifying agent is: C ₁₂H ₁₅O (CH ₂CH ₂₀O) ₉H.

And described rust-preventive agent is: NH ₂CH ₂CH ₂OH.

And described mineral acid is a phosphoric acid.

A kind of method for preparing wet-leveling liquid, preparation method's step is as follows:

(1) mineral acid, potassium hydroxide are dropped in the still in order with water dissolution, organic amine, EDTA--four sodium respectively, stir and be warming up to 85 ℃, after question response is complete, constant temperature 5-15 minute;

(2) constant temperature adds rust-preventive agent, rust-preventive agent to 80-90 ℃, and recirculation was stirred 10-30 minute;

(3) be cooled to 50-60 ℃, add emulsifying agent, kilfoam, recirculation was stirred 10-30 minute;

(4) add deionized water, circulation was stirred 20 minutes;

(5) inspection by sampling appearance transparent; 1% emulsion does not have layering; PH value 8-10, antirust 3% aqueous solution of cast iron filing: non-corroding;

(6) after the assay was approved, 100 order net filtrations obtain the wet-leveling liquid finished product.

Advantage of the present invention and beneficial effect are:

1, the wet-leveling liquid that the present invention relates to is made up of water-soluble anti-rust additive, lubricant, tensio-active agent and deionized water, be used for the wet smooth operation that cold rolled sheet is produced, roll to band steel and levelling machine has good cleanup action, lubrication and rust inhibition, rust-preventing characteristic and defoaming with good cleaning, excellence, this wet-leveling liquid has proper lubrication performance and frictional coefficient, has good consistency with slushing oil, be applicable to the temper rolling technology after cold-rolled steel sheet is annealed, can guarantee at a high speed, steadily rolling, to reducing wear.

2, wet-leveling liquid provided by the invention has good rust-preventing characteristic and corrosion resistance; can effectively protect the good cleaning of work roll; the steel band degree of cleaning have been improved; prevent from roll to form chip and at steel band; can reduce work roll knot dirty, effectively control draft, and avoid skidding and the steel plate coating oil phase holds and prevents fat/oil pollution.

3, wet-leveling liquid provided by the invention does not contain nitrite, boron and amine and other harmful material, safe and reliable, its discharging meets GB3838-88II level environmental protection standard, and biological Lethal Dose 50 safety and sanitation quality index such as (LD50) is better than the national regulation requirement; When 1300 meters/minute high-speed rollings, still has good antirust cleaning performance, smooth steel plate plate colourless is bright, is rich in gloss, coil of strip is deposited non-corroding more than 10 days, it is effective to suppress macula lutea, obviously be better than original use contain the inorganic wet-leveling liquid of nitrite, fill the domestic gaps, reach (part surpasses) external like product bleeding edge.

4, the present invention adopts organic amine and mineral acid as the composite antirust agent, have good cleaning and good anti-rust properties, there is not the corrosion of plate face in the steel plate after smooth and produces the color spot problem, and plate quality is good, and have suitable lubricity, do not have the nitrous acid pollution problem.Film forming speed is fast, in 2 clocks, makes the steel plate after smooth not have plate face generation macula lutea problem, and plate quality is good.

Embodiment

Below in conjunction with embodiment, the present invention is further described, and following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.

The smooth liquid of organic type is with water soluble anti-rust agent, tensio-active agent and the multiple functional additive concentrated type wet-leveling liquid that is composited.

A kind of wet-leveling liquid, its moiety and weight percent are as follows:

The effect of EDTA--four sodium is important complexing agents, is used for complexing of metal ion and isolating sequestering agent, water conditioner, washing composition can replace with disodium salt.

Kilfoam

Wherein recommend to use m=9, the kilfoam of n=8.

Hydramine: NH (CH ₂CH ₂OH) ₂

Emulsifying agent is: C ₁₂H ₁₅O (CH ₂CH ₂O) ₉H

Rust-preventive agent: NH ₂CH ₂CH ₂OH

A kind of wet-leveling liquid preparation method, step is as follows:

(1) with phosphoric acid, drop in order in the still with water dissolution, Monoethanolamine MEA BASF, EDTA--four sodium respectively, stir and be warming up to 85 ℃, question response fully after, constant temperature 10 minutes;

(2) constant temperature to 85 ℃ adds rust-preventive agent, rust-preventive agent, and recirculation was stirred 20 minutes;

(3) be cooled to 60 ℃, add emulsifying agent, kilfoam, recirculation was stirred 20 minutes;

(4) add deionized water, circulation was stirred 20 minutes;

(5) inspection by sampling appearance transparent; 1% emulsion does not have layering; PH value 8-10, antirust 3% aqueous solution of cast iron filing: non-corroding;

(6) after the assay was approved, 100 order net filtrations obtain the wet-leveling liquid finished product;

(7) with the wet-leveling liquid finished product that makes, the plastics pot of packing on request.

Using method is as follows:

This wet-leveling liquid is used for the wet smooth complete processing of cold rolling book plate factory, and stoste is diluted 10-20 doubly, is directly used in cast iron, the use of steel part aqueous rust preventive; With deionized water wet-leveling liquid is made into the aqueous solution of 4%～6% concentration, is sprayed onto levelling machine band steel inlet side.Concentration detects by measuring the specific conductivity of solution, checks in according to the concentration-specific conductivity curve that provides with product then.

Use and precaution

Adopt deionized water concentration dilution preparation in accordance with regulations before using, the concentration that concentrated solution is diluted to about 5% is used, in the sclerosis cold-rolled process, be sprayed onto the on the suction side on the upper and lower surface of steel band with controlled atomizer.Consumption with about 5 liters/minute (representative data should be decided according to roll speed, width of steel band and air purge set) sprays, and makes it to cover fully rolling width, but will avoid excessive use.Any excessive smooth liquid of bringing roll gap into is removed with gas blower usually.

The correlation parameter of this wet-leveling liquid detects as follows:

Project	Wet-leveling liquid
		Outward appearance	Transparent liquid
Density (20 ℃), kg/m3	1000～1200
		PH value (5%m/m)	9.00～11.00
Mechanical impurity	Do not have
		Cleaning performance, %	≥85
Rust-preventing characteristic	Qualified

Claims (8)

1. wet-leveling liquid, it is characterized in that: its moiety and parts by weight are as follows:

2. wet-leveling liquid according to claim 1 is characterized in that: described kilfoam is:

3. wet-leveling liquid according to claim 1 is characterized in that: described organic amine is a Monoethanolamine MEA BASF.

4. wet-leveling liquid according to claim 1 is characterized in that: described emulsifying agent is: C ₁₂H ₁₅O (CH ₂CH ₂₀O) ₉H.

5. wet-leveling liquid according to claim 1 is characterized in that: described rust-preventive agent is: NH ₂CH ₂CH ₂OH.

6. wet-leveling liquid according to claim 1 is characterized in that: described mineral acid is a phosphoric acid.

7. method for preparing the described wet-leveling liquid of claim 1, it is characterized in that: preparation method's step is as follows:

(1) mineral acid, potassium hydroxide are dropped in the still in order with water dissolution, organic amine, EDTA--four sodium respectively, stir and be warming up to 85 ℃, after question response is complete, constant temperature 5-15 minute;

(2) constant temperature adds rust-preventive agent, rust-preventive agent to 80-90 ℃, and recirculation was stirred 10-30 minute;

(3) be cooled to 50-60 ℃, add emulsifying agent, kilfoam, recirculation was stirred 10-30 minute;

(4) add deionized water, circulation was stirred 20 minutes;

(5) inspection by sampling appearance transparent; 1% emulsion does not have layering; PH value 8-10, antirust 3% aqueous solution of cast iron filing: non-corroding;

(6) after the assay was approved, 100 order net filtrations obtain the wet-leveling liquid finished product.